<template>
  <el-dialog
    title="员工导入"
    width="500px"
    :visible="showExcelDialog"
    @close="$emit('update:showExcelDialog', false)"
  >
    <el-row type="flex" justify="center">
      <div class="upload-excel">
        <!-- accept导入的文件格式 -->
        <input
          ref="excel-upload-input"
          class="excel-upload-input"
          type="file"
          accept=".xlsx, .xls"
          @change="uploadChange"
        >
        <div class="drop">
          <i class="el-icon-upload" />
          <el-button type="text" @click="getTemplate">下载导入模板</el-button>
          <span>将文件拖到此处或
            <el-button type="text" @click="uploadExcel">点击上传</el-button>
          </span>
        </div>
      </div>
    </el-row>
    <el-row type="flex" justify="end">
      <!-- update:props属性名，值 直接修改 .sync修饰符的属性值 -->
      <el-button
        size="mini"
        type="primary"
        @click="$emit('update:showExcelDialog', false)"
      >取消</el-button>
    </el-row>
  </el-dialog>
</template>

<script>
import { getExportTemplate, uploadExcel } from '@/api/employee'
// 导入  excel导入导出插件
import FileSaver from 'file-saver'
export default {
  props: {
    showExcelDialog: {
      type: Boolean,
      default: false
    }
  },
  methods: {
    // 导入员工模板
    async getTemplate() {
      const data = await getExportTemplate()
      FileSaver.saveAs(data, '员工导入模板.xlsx')
    },
    // 点击上传文件
    uploadExcel() {
      // 点击上传文件触发input的click事件
      // this.$refs.属性名 === this.$refs[属性名]
      this.$refs['excel-upload-input'].click()
    },
    // change事件
    async uploadChange(e) {
      // 找到上传的信息files
      console.log(e.target.files)
      const files = e.target.files
      // 判断如果有文件在上传
      if (files.length > 0) {
        // 因为要以formdata格式调接口 所以 new一个FormData对象 放入文件上传
        const data = new FormData()
        // file: file类型
        data.append('file', files[0]) // 将文件参数加入到formData中
        try {
          await uploadExcel(data)
          // 成功
          // 通知父组件 我上传成功
          this.$emit('uploadSuccess')
          // 关闭弹窗
          this.$emit('update:showExcelDialog', false)
          // 清空input
          this.$refs['excel-upload-input'].value = ''
        } catch (error) {
          // 失败
          // 清空input
          this.$refs['excel-upload-input'].value = ''
        }
      }
    }

  }
}
</script>

<style scoped lang="scss">
.upload-excel {
  display: flex;
  justify-content: center;
  margin: 20px;
  width: 360px;
  height: 180px;
  align-items: center;
  color: #697086;
  .excel-upload-input {
    display: none;
    z-index: -9999;
  }
  .btn-upload,
  .drop {
    border: 1px dashed #dcdfe6;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 160px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  .drop {
    line-height: 40px;
    color: #bbb;
    i {
      font-size: 60px;
      display: block;
      color: #c0c4cc;
    }
  }
}
</style>
